Invention Grant
US07660088B2 System, apparatus and method for compensating the sensitivity of a sequence element in a line current differential relay in a power system
有权
用于补偿电力系统中的线路电流差动继电器中的序列元件的灵敏度的系统，装置和方法
- Patent Title: System, apparatus and method for compensating the sensitivity of a sequence element in a line current differential relay in a power system
- Patent Title (中): 用于补偿电力系统中的线路电流差动继电器中的序列元件的灵敏度的系统，装置和方法
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Application No.: US11337894Application Date: 2006-01-23
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Publication No.: US07660088B2Publication Date: 2010-02-09
- Inventor: Joseph B. Mooney , Gabriel Benmouyal
- Applicant: Joseph B. Mooney , Gabriel Benmouyal
- Applicant Address: US WA Pullman
- Assignee: Schweitzer Engineering Laboratories, Inc.
- Current Assignee: Schweitzer Engineering Laboratories, Inc.
- Current Assignee Address: US WA Pullman
- Agency: Law Offices of Eugene M. Cummings, P.C.
- Main IPC: H02H3/00
- IPC: H02H3/00 ; H02H7/00
Abstract:
An apparatus and method compensate for the sensitivity of at least one line current differential element of a first current differential relay providing differential protection for a transmission line of a power system during a single-phase pole-open condition. The apparatus includes a first delta filter configured to remove a first pre-fault current from a first fault current of the transmission line to derive a compensated first current phasor. The apparatus also includes a second delta filter configured to remove a second pre-fault current from a second fault current of the transmission line to derive a compensated second current phasor. The compensated first and second current phasors are provided to the at least one line current differential element to compensate the sensitivity of the at least one line current differential element.
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